The house has been sealed off while officers carry out their enquiries.

Detective Inspector Graeme Talbot said: ‘We’re in the early stages of our investigation and currently trying to establish the exact circumstances surrounding these deaths; however, initial enquiries lead us to believe this is an isolated incident.’

A statement on Norfolk Fire and Rescue website said: ‘A crew from Great Yarmouth and a crew from Gorleston extinguished a fire in a domestic property using hose reels and wearing breathing apparatus.